The X1 and X2 generations of X-rayed barley seeds -were investigated and the following results were ob'tained . 1 . The difference of fertility exists arnong, spikes, of an individual plaat in X1 generetion. The progenies, , of spikes with" normal fertility in X1 genetation may, often segregate into fertile and partially sterile plants in X2. On the other hand, partially sterile spikes may often produce fertile plants only. 2 . Seventeen from sixty spikes obtained frorn eighteen X1 plahts segregated structura' hybrids ; fourteen of them havd a ring of four chromosomes, two have .a ring of six and 'one has two rings of four. Seed Ifertilities of plants with a ring of four are 51. 5-74.5%, plants with a ring of six are 47.5 and 53.2%and plants with two rings of four are 48. 0%. 3 . One triploid plant and several mutants, which are male sterile, Iiguleless and short culmed, are detected . Possibility of applying BURNHAN'S multiple translocation method in barley is discussed . Cqnsidering the suspected sterility of translocation heterozygotes, a multiple translacation type with a ring of eight and a ring of six is supposed to be more applicable than that With a ring of fourteen. Procedures to iuduce such a multiple translocation type are suggested, Where repeating X-ray treatment of translocation honcLozygote might be adopted to accumulate translocatians step by step.
{"title":"X-ray induced mutation tn barley.","authors":"Yonehachi Nishimura, H. Niizeki, Takeo Saito","doi":"10.1270/JSBBS1951.1.210","DOIUrl":"https://doi.org/10.1270/JSBBS1951.1.210","url":null,"abstract":"The X1 and X2 generations of X-rayed barley seeds -were investigated and the following results were ob'tained . 1 . The difference of fertility exists arnong, spikes, of an individual plaat in X1 generetion. The progenies, , of spikes with\" normal fertility in X1 genetation may, often segregate into fertile and partially sterile plants in X2. On the other hand, partially sterile spikes may often produce fertile plants only. 2 . Seventeen from sixty spikes obtained frorn eighteen X1 plahts segregated structura' hybrids ; fourteen of them havd a ring of four chromosomes, two have .a ring of six and 'one has two rings of four. Seed Ifertilities of plants with a ring of four are 51. 5-74.5%, plants with a ring of six are 47.5 and 53.2%and plants with two rings of four are 48. 0%. 3 . One triploid plant and several mutants, which are male sterile, Iiguleless and short culmed, are detected . Possibility of applying BURNHAN'S multiple translocation method in barley is discussed . Cqnsidering the suspected sterility of translocation heterozygotes, a multiple translacation type with a ring of eight and a ring of six is supposed to be more applicable than that With a ring of fourteen. Procedures to iuduce such a multiple translocation type are suggested, Where repeating X-ray treatment of translocation honcLozygote might be adopted to accumulate translocatians step by step.","PeriodicalId":270267,"journal":{"name":"Japanese journal of breeding","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1952-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114749941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Improvement of fertility and inacion of self incompatibility in the progenies of autotetraploid in chinese cabbage.","authors":"T. Kadota, Kiyoshi Ito","doi":"10.1270/JSBBS1951.1.151","DOIUrl":"https://doi.org/10.1270/JSBBS1951.1.151","url":null,"abstract":"","PeriodicalId":270267,"journal":{"name":"Japanese journal of breeding","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1952-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130224615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An attem, pt has been m, ade to analyse the variance 'of grain yield on Fl plant and of endosperm-germ ratio in 24 inbred lines and its hybrids in maize. The following conclusions were obtained from the data obtained. 1 ) . The increase of endosperm-germ ratio through fertilization by forelgn pollen was recognized pnly in few special - inbred lines, and not signifieant in m, ost of them... 2). In the both cases, grain yield on Fl plant and endosderm-germ ratio, it may be assum., ed that the heterosis should be appeared as a result of the. cum, ulative action of any two giveh alleles among genes of a m, ultiple allelomorphic series as suggested already by East (1936). 3). There seems ta be a barely significant correlation (r=0. 3) between the increases of endosperrD.-gerrc' ratio and of tlle abili ?? y of grain-yieldihg in hybred strain, becuse of the existence of a com, mon regres-sion within all of inbred lines. 4-). A fact that any one of inbred lines differes si*anificantly from the another on the am, ount of re-gression in the grain yield on F, plant and the endo-sperm, *germ ratio may be demonstrated as a result of possible combination between two independent factors, one for the a*fain yield and another for the endosperm-germ, rati.o. 5). The cause that the prediction of grain yielding ability for each inbred line by meahs of the lri:easure-ment on F1 plant of specific grain characters such s endosperm, -gorm ratio is in difficulty, was discussed
{"title":"Analysis of variance of the endosperm-germ ratio and of the F1 yield of grains in inbred lines and its single crosses in maize.","authors":"T. Suto","doi":"10.1270/JSBBS1951.1.141","DOIUrl":"https://doi.org/10.1270/JSBBS1951.1.141","url":null,"abstract":"An attem, pt has been m, ade to analyse the variance 'of grain yield on Fl plant and of endosperm-germ ratio in 24 inbred lines and its hybrids in maize. The following conclusions were obtained from the data obtained. 1 ) . The increase of endosperm-germ ratio through fertilization by forelgn pollen was recognized pnly in few special - inbred lines, and not signifieant in m, ost of them... 2). In the both cases, grain yield on Fl plant and endosderm-germ ratio, it may be assum., ed that the heterosis should be appeared as a result of the. cum, ulative action of any two giveh alleles among genes of a m, ultiple allelomorphic series as suggested already by East (1936). 3). There seems ta be a barely significant correlation (r=0. 3) between the increases of endosperrD.-gerrc' ratio and of tlle abili ?? y of grain-yieldihg in hybred strain, becuse of the existence of a com, mon regres-sion within all of inbred lines. 4-). A fact that any one of inbred lines differes si*anificantly from the another on the am, ount of re-gression in the grain yield on F, plant and the endo-sperm, *germ ratio may be demonstrated as a result of possible combination between two independent factors, one for the a*fain yield and another for the endosperm-germ, rati.o. 5). The cause that the prediction of grain yielding ability for each inbred line by meahs of the lri:easure-ment on F1 plant of specific grain characters such s endosperm, -gorm ratio is in difficulty, was discussed","PeriodicalId":270267,"journal":{"name":"Japanese journal of breeding","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1952-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131186271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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